FIN MATERIAL FOR ALUMINUM HEAT EXCHANGER MANUFACTURED BY VACUUM BRAZING

摘要

PURPOSE:To obtain the titled fin material having improved corrosion resistance and an improved sacrificial anode effect by adding restricted amounts of Sn and Zn to Al or by further adding Mg and Mn, Zr or Cr. CONSTITUTION:This fin material for an Al heat exchanger manufactured by vacuum brazing consists of, by weight, 0.02-0.1% Sn, 0.04-0.09% Zn and the balance Al with inevitable impurities or further contains 0.05-1% Mg and one or more among 0.1-1.5% Mn, 0.02-0.2% Zr and 0.02-0.3% Cr. The fin material having said alloy composition is electrochemically base, has superior corrosion resistance, and prevents well the corrosion of a tube material by the significant sacrificial anode effect. The heat exchanger can be used for a long period because of the corrosion resistance of the tube and fin materials.